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FREAD
Section: Linux Programmer's Manual (3)
Updated: 1996-05-17
Index
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NAME
fread, fwrite - binary stream input/output
SYNOPSIS
#include <stdio.h>
size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
size_t fwrite(const void *ptr, size_t size, size_t nmemb,
FILE *stream);
DESCRIPTION
The function
fread()
reads
nmemb
elements of data, each
size
bytes long, from the stream pointed to by
stream,
storing them at the location given by
ptr.
The function
fwrite()
writes
nmemb
elements of data, each
size
bytes long, to the stream pointed to by
stream,
obtaining them from the location given by
ptr.
For non-locking counterparts, see
unlocked_stdio(3).
RETURN VALUE
fread()
and
fwrite()
return the number of items successfully read or written (i.e., not the
number of characters).
If an error occurs, or the end-of-file is
reached, the return value is a short item count (or zero).
fread()
does not distinguish between end-of-file and error, and callers must use
feof(3)
and
ferror(3)
to determine which occurred.
CONFORMING TO
C89, POSIX.1-2001.
SEE ALSO
read(2),
write(2),
feof(3),
ferror(3),
unlocked_stdio(3)
COLOPHON
This page is part of release 3.05 of the Linux
man-pages
project.
A description of the project,
and information about reporting bugs,
can be found at
http://www.kernel.org/doc/man-pages/.
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- CONFORMING TO
-
- SEE ALSO
-
- COLOPHON
-
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